Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 11 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/15/2021   22:37:46   (  -0.01,-137.22) (   0.79,-133.58)  414.26                80
 11/17/2021   10:56:33   (   0.01,-137.22) (   0.35,-138.75)  173.73                80
 11/18/2021   10:40:14   (   0.01,-137.22) (  -0.68,-134.16)  349.89                80
 11/19/2021   22:59:10   (  -0.01,-137.21) (  -0.47,-139.36)  244.54                80
 11/20/2021   22:42:51   (  -0.01,-137.21) (   0.57,-134.77)  278.66                80
 11/22/2021   11:01:36   (   0.01,-137.20) (   0.63,-139.93)  310.78                80
 11/23/2021   10:45:18   (   0.01,-137.19) (  -0.40,-135.33)  211.84                80
 11/24/2021   23:04:13   (  -0.01,-137.17) (  -0.74,-140.54)  383.94                80
 11/25/2021   22:47:54   (  -0.01,-137.16) (   0.24,-135.94)  138.40                80
 11/27/2021   11:06:40   (   0.00,-137.14) (   0.91,-141.11)  452.12                80
 11/28/2021   10:50:22   (   0.00,-137.13) (  -0.13,-136.51)   69.85                80